Decarbonizing-tool for pistons of gas-engines.



APPLICATION FILED NOV. 18, 1913.

Patented July 14, 1914.

mvefmtoz.

inwind/12A o., wAsHlNcroN. n. c.

cable to the decarbonizing of piston heads UNTTD SATB@ FATENT QFFTCE.

FRANKLIN LOTTER, OF ELKTON, MICHIGAN.

DECARBONIZING-TOOL FR PISTONS 0F GAS-ENGINES.

incassa Application led November 18, 1913.

To all whom t may concern:

Be it known that I, FRANKLIN LoT'rnR, a citizen of the United States,residing at Elkton, in the county of Huron and State of Michigan, haveinvented certain new and useful Improvements in Decarbonizing- Tools forPistons of Gas-Engines; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to devices for cleaning surfaces which are notreadily accessible to ordinary tools, and is especially appliof internalcombustion engines without necessitating the dismounting of thecylinders.

The object of the invention is to provide a simple and cheap device ofthis character constructed for ready entrance through a spark plug orothervsmall aperture, and having reinforcing means for stitt'ening itafter its insertion, to provide for its eicient operation. i

W'ith this and other objects in view, the invention consists ofvcertainnovel features of construction, and the combination and arrangement ofparts as will be more fully described and claimed.

In the accompanying drawings Figure 1 represents a side elevation ofthis scraping tool in the act of being inserted through a small openingfor use in decarbonizing a piston head, the engine sleeve and pistonbeing shown in section. Fig. 2 is a similar view showing the reinforcingor stiening means in position for use. Fig. 3 is a front elevation on anenlarged scale of the tool. Fig. 4 is an edge view partially in section.Fig. 5 is a transverse section on line 5 5 of Fig. 4.

In the embodiment illustrated, a cleaning tool or scraping implement 1is shown composed of a plurality of superimposed Hat flexible strips,three being here shown, and numbered 2, 3, and 4. These strips arepreferably constructed of spring steel and slidable longitudinallyrelative to each other. The main or scraping strip 2 is slightly longerthan the others and has a scraper 5 at one end, shown inthe form of ahook. This strip 2 is also equipped with a plurality of longitudinallyspaced keepers 6, 7, and 8, two of which are preferably arrangedSpecicaton of Letters Patent.

Patented July 14, 1914.

serial No. 801,649.

at opposite ends of said strip on one face` i thereof and the otherintermediately of the ends of the strip. The keepers 7 and 8 disposedrespectively at the middle and at the rear end of the strip 2 aredesigned to guide the strips 3 and 4 in their movement back and forth.The keeper 6 at the front end of the strip 2 extends in a directionopposite to that of the hook 5 and is designed to receive one end of thestrips 3 and 4, as shown in Fig. 2. The strips 3 and 4 are approximatelythe same length and the inner end of each is'preferably pointed as shownat 9 to facilitate their ready passage into the loop or keeper 6. Thesepointed ends are also provided with laterally extending lugs 10 forlimiting the insertion of said ends in said keeper 6. The rear ends ofthe strips 3 and 4 are outturned as shown at 11 extending in aAdirection opposite to that of.

the hook 5 on the strip 2andare designed as handles or thumb pieces foractuating the strips. These strips 3 and 4 are also provided on theiropposite edges at a point intermediately of their ends with extensionsor stops 12, which are designed to engage the inner edge of ythe keeper8 to limit the outward movement of said strips 3 and 4 and which alsoengage the outer edge of the keeper 7 for limiting the inward movementof said strips should the pointed ends thereof not be engaged with thekeeper 6.

ln the use of this device, the strips 3 and 4 are moved outwardly intoposition shown in Fig. 1, the strip 3 projecting at its rear end beyondthe strip 4. When in this position the hooked end of strip 2 extendssome distance in `advance of the pointed ends of strips 3 and 4, andbeing very lexible may be readily inserted through a small aperture,such as a spark plug aperture shown in 1. After this flexible hooked endof the strip 2 has been inserted through the aperture inthe cylinderhead, the outturned end of the strip 4 is engaged by the right hand ofthe operator and forced inwardly until its pointed end enters the keeper6 and until the stops thereon abut against the reary edge of saidkeeper.. Then the spring strip 3 is forced inwardly until the pointedend thereof also enters the keeper 6. iihen the parts are in thisposition as shown in Fig. 2, the tool will be stiffened or reinforcedthroughout its entire length and it may then be readily forced back andsoA fort-h over the piston head to remove the carbon therefrom by thescraping implement 5 which comes in contact therewith.

To remove the implement, the strips 8 and 1i may be drawn outwardly totheir eX- treme limit and the flexible portion of the strip 2 will thenconform to the restricted space through which it must enter, and

-permit it to be readily removed.

The outer end of the strip 2 is preferably left straight so that it maybe used when desired for scraping purposes, should occasion demand. y

The keeper i' which is arranged intermediately of the yends of the stripis made 'L considerably longer than the other two keepers for thepurpose of affording a hand hold or grip, which may be grasped in theleft hand of the operator, and his right hand used to slide the strips 3and l back and forth.

Vhile this tool has been described as especially applicable for cleaningpiston heads .Copies of this patent may be obtained for said strips areextended the tool is rendered flexible and when contracted it is rigid.

2. A. scraping tool comprising a plurality of superimposed flexiblemetal strips, one of said strips having a scraping element at one endand a plurality of longitudinallydisposed keepers, the other stripshaving Vone end pointed and-their other end bent laterally to formfinger grips, and stops on said sliding strips spaced from the' pointedends thereof. y

3. A cleaning tool comprising a plurality of superimposed flexible metalstrips', one of said strips being provided with. a scraping elementextending laterally therefrom in one direction, a keeper extending in anopposite direction adjacent said element, an elon- 'gated keepervarranged on said strip intermediately of its ends and another keeper atthe other end of said strip, the other strips being slidably mounted insaid kee-pers and having one end pointed and equipped with lateralshoulders and the other end bent laterally, said sliding strips beingalso provided with stops arranged intermediately lof their ends forlimiting their outward movement.

ln testimony whereof I have hereunto set y my hand in presence of twosubscribing `witnesses. p

FRANKLIN LO'IrlER.`

`Witnesses:

M. L. ACKERMANN, O. B. SOELMER,

ive cents each, by addressing they Commissioner of Patents, Washington,D. C.

